Tulisa whizzes around Miami in The-Dream's Ferrari and visits sex club
Mark had jetted out for a photo shoot, but couldn't resist getting his management to arrange a hook-up with his top crush.
Tulisa seemed more than happy to let the ladies' man crash her month-long US trip, while Mark excitedly Tweeted: Look who I just bumped in 2 in #miami. Wild night!!'
The 25-year-old has made no secret of fancying Tulisa, 23, and Tulisa revealed: He sent me a message and said I was fit. It was funny, but I might be a bit intimidating for him.'
She's also become NBFs with 34-year-old producer The-Dream, who's working on her album.
He's whizzed her round Miami in his Ferrari and taken her for a night at a sex club and on trips to Disney World.
Our source says: He's a good friend and they have fun.'
Tulisa's ex Fazer might not be too happy, though.
The-Dream has three kids with his first wife, then married singer Christina Milian in 2009 when she fell pregnant with his daughter.
They split after photos emerged of him on holiday with his assistant.
Read more celebrity Love Juice - and see Tulisa with The-Dream - in the latest issue of Now magazine dated 12 March - out now!
SEE PICTURES Tulisa Contostavlos and N-Dubz at Radio 1 in London